Function remove

docs/themes/htx/source/js/vue.js:136–143

* Remove an item from an array

(arr, item)

   * Remove an item from an array
   */
  function remove(arr, item) {
    if (arr.length) {
      var index = arr.indexOf(item);
      if (index > -1) {
        return arr.splice(index, 1);
      }
    }
  }

  /**
   * Check whether the object has the property.